Pump for



Oct. 23, 1928.

c. MccUEN PUMP FOR REFRIGERATING APPARATUS Filed Jan. 17. 1920 4 sheets-Sheet QW Lmm Oct. 23, 1928.

c. l.. MccUEN PUMP FOR REFRIGERATING APPARATUS Filed Jan. 17. 1920 4 Sheets-Sheet Oct. 23, 1928.

c. L, MccUl-:N

PUMP FOR REFRIGERATING APPARATUS Filed Jan. 17. 1920 I 4 Sheets-snee+ oct. 23, 192s. 1,688,342

C. L. MCCUEN PUMP 'Fon REFRIGERATING APPARATUS.

Filed Jan. 17 1920 4 Sheets-Sheet 4 7 :5f 36 35 M2559'. 5. 54 555] E 4g? v 3] 5] 53 Patented Oct. 23d, 1928.

vTEN'EL" CHARLES L. MCCUEN, 0F CHCAGG, ILLINOS, ASSIGNOB., BY MESNE ASSIGNMENTS, T0

. FRGIDAIRE CORPORATION, A CGRPORATION 0F DELAVTARE.

PUMP FOR REFREGERATING APPARATUS.

Application filed January 17, 1920.k Serial No. 35,2 039.

My invention relates to refrigerating apparatus in which a `compressible refrigerant such as sulfur dioxid is employed, the same being compressed by a suitable pump or compressor, then condensed intov a liquid, then permitted to expand in reifrigerating coils or thc like and thereaiter compressed and so on through continuing cycles. The object of my invention is to provide a simple, efficient and reliable apparatus of this kind characterized more particularly by certain improvements in the water circulating system or' the apparatus and in t ie structure and assembly' of the pump chamber and the condenser chamber. p

ln the drawings Fig. 1 is a plan view of my apparatus; Fig. 2 a section on the line 2 2 of Fig. 1; Fig. 3 an end elevation of the apparatus with the 'electric motor removed; Fig. 4 a side elevation of the apparatus with portions orx the two cylinders or chambers broken away as on the line 2 2 (extended) of Fig. 1 and with the water valve shown in section as on the line 8 8 of Fig. l; Fig. 5 a section ony the line 5 5 of Fig. 4; Fig. 6 a vertical section on theline 6 6 of Fig. 4; and Fig. 7 a horizontal section on the line 7 7 o Fig. 6.

As my invention relates to the pump and condenser cylinders it is unnecessary to show the complete re'frigerating systemand therefore the refrigerating coils more particularly which may be of the usual and well-known character are not shown. Referring to the particular embodiment of the apparatus as herein shown, the same comprises a pump cylinder or chamber 1,'a compressor or pump 2 therein, a prime mover such as an electric motor 3 for driving the pump and a condenser cylinder or chamber 4 all preferably mounted upon a suitable single base `plate 5 and having thc connections, coils, and other devices hereinafter set forth in detail. The pump 2 is ot the general construction and mode ooperation as the pump illustrated and described in Leonard Patent No. 1,233,-

069 dated July 10, 1917. This pump ischaracterized bytwo intermeshing herring-bone gears, 6 and 7 contained within a casing 8 and driven by the shait 9 which is in turn driven by the extended armature shaft lOrthrough the medium of the coupling 11.v The pump is submerged in a body of oil contained within the pump chamber the oil level being betweenthe test cocks a) and theoil is supplied to the gears through a series of restricted passages 12 entering through the top of the caslower distance tubes 28 ing and emerging from the interior thereof at the top middle portion of said gears. In practice these restricted oil supply openings 12 are formed for the most part by central bores through screw plugs 13, Fig. 6. The gas as. it comes from the refrigerating coils through the inlet pipe 14 and inlet passage 15 through thepuuip head 16 enters the pump chamber at 17 at the lower portion thereof and in communication with the pump gears. The1 is compressed by these gears and is Ynischaiged at the upper portion of the casing into the horizontal discharOe passage 18 and the vertical dischar'e pipe 19. This dischargel pipe 19 extends above the oil level in the pump chamber and towards the upper part thereof, discharglng the gas into the space above such body di oi The pump cylinder is provided with a removable head 20 to whose lower side the cooling coils for the pump cylinder together with the baille plates and coil supports are attached so that such cover and said parts constitute a unit which in assembling the structure is inserted within the pump chamber and the cover thereupon secured to the pump cylinder lin suitable manner as by means of the bolts 21.

The cooling coils 22 which circulate cold water are of such a size and length as to keep this chamberl at the proper temperature which is somewhat higher than the temperature oi" the cooling coils in the condense chamber hereinafter described. These coils' rest upon a horizontal supporting plate 23 which is-itself supported and held t2 the cover 20by vertical rods 24, the lower ends or heads of which support the plate 23 and the .upper ends of which are screw threaded into the depending bosses 25 of the cover. These rods are also adapted to support and position thetwo baffle plates 26 and 27 the former of which is clamped between the7 n interposed between the plates 3 and 26 and the Aupper distance tubes 29 interposed between Vthe plates 26 and 27. The plate 26 has its periphery upwardly flanged so as to retain any liquid refrigerant'that might possibly be discharged from the pipe 19 and the same is provided with a central opening through which such discharge pipe 19 passes and which is provided with an outwardly extending flange 30 fitting around such pipe. The other baille plate 27 which is itself clamped between the lower are adapted to ends of the bosses l25 and the top of the distance tubes 29 has a downwardly turned flange and is of less diameter than the plate 2.6.. The gas which is discharged from the pipe 19 strikes against. the central portion of the plate 27 and is downwardly deflected so as toV separate any liquid refrigerant from the gas. The lower plate 26 acts to catch any such liquid refrigerant and prevent it from dropping upon the body ot oil below, such plate retaining the liquid refrigerant. until such time as in the course of operation it will become gaseous and pass on to the condenser chamber.

' The cooling coils 22 are likewise secured to the cover 29 as shown inv Fig. 6 wherein it' is seen that the ends of these coils are secured to couplings which pass through vertical openings in the cover and are secured to the pipe ittings 32 extraneous oi the cover.

The cover 20 is provided with a central gas outlet 33 which is cont-rolled by ay hand operated valve 34 contained within a valve casing 35 removably secured to the cover by the 'bolts 36. In the drawings this valve 34 is shown closed but by removing the screw .cap 37 and turning the screw .threaded stein 38 of the valve by means of a suitable socket wrench, the valve may be readily opened and the same remains in open condition during the regular operation of the apparatus.

Next describingt'he condenser chamber and associated part-s, the y.cooling coils 39 are ot' much greater' extent than the cooling coils 22 because it is necessary to keep the condenser chamber at a lower teinperatui'e in order to condense the incoming refrigerant or gas vsupplied from .the pump chamber. These vcoils 39 are supported by a horizontal plate 40 which in turn is supported from the lower side of the top cover 41 of the condenser chamber through the mecium oi' the vertical rods 42 which screw into the bosses 43 depending from the lower side ot the plate 4l. The upper ends of the coils 39 are provided with littin gs 44 which passl through Vveitical openings in the plate 41 and are tliereat secured to pipe connections 45 and 46. The pipe connection 46 is provided with a valve for controlling the supply of water through the coils 22 and 39 and for regulating the amount of 'flow relatively through such two coils. As shown in Fig. 5 this valve is a hollow plug valve 47 provided with a stem 4S to whose upper end is secured an operating handle 49. This valve is located in the pipe connection 46 which is provided with the port 50 coinmunieating with the outlet end ot the coil 39, a port 51 communicating through the horizontal pipe 52 with one of the pipe connections 32, and also with a port 53, which ports are governed by the valve 47. For this purpose i the valve has a central vertical passage 54 and a lateral communicating way or passage 55 ongits periphery. In addition this pipe connection 46 has an outlet passage 56 with which the outlet 50 of the coil 39 is adapted to communicate directly through the passage 53, or indirectly,through .pipe .connection 52, .cooling coils 22 and lpipe connection 57 which connects between the outlet of the coils 22 at one of the pipe connections 32 and the pipe connection 46.

When the valve 47 is in the position shown in Fig. 5 all of the water which passes through the coils 39 is passed through the coils 22 inasmuch as the passages 54 and are in communication with port 51 and pipe Then the valve 47 is slightly rotated in a clock-wise direction a portion ot the water may be passed directly to the dis :harge pipe 56 through the port and passage 53, the rce mainder which may be as much as desired passing througl-i the coils 22. Upon a further rotatioii of the valve 47 the port 51 may be entirely closed and the supply of water to the coils 22 may be cut'oiof and all of the water passed directly through thc port 53 and discharge pipe 56, it being understood that at this time the passage way 55 will be in register with the port 53. By rotating the valve still further the amount of water passing through the condenser coils may be regulated by restricting the passage V55 by incomplete register between such passage and 'i the port 53. The amount of flowthrough the condenser coils is thus restricted by restricting the discharge of the water therefrom. In this manner and by these means the amount of water supplied to t-lie coils 22 relative to that supplied .to the coils may be controlled and regulated to a nicety and also by the employment ot a` single valve all or a portion of the watei discharged from the condenser coils may be by-passed through the pump chamber coils, and also the amount of the liow through the condenser coils may be regulated to any desired extent.

From the 'pump chamber the gas passes upwardly through the outlet 33, past the valve 34, through the horizontal pipe 58 through arpassage 59 in valve casing 60 similar to .the casing past the valve 61 (which in operation would of course be open) and through the inlet port 62 in the cover 41 of the condenser chamber, as shown in detail in Fig. 2.

The cylinder covers which are thus reniovllG able with their cooling coils are connected toy gether by the water and gas connections and are therefore both removable at the same time together with such coils, after the fastening bolts 21 are removed.V

, I claim: f

1. In a refrigeratiug apparatus, the coinbination with a pump chamber and the pump therefor, .of a removable cover for the cha-inbei', cooling coils attached to and depending from .the cover, a plate forming a support tor the coils, lmeans attached to the cover for supporting the plate, and a drip plate also Vsupported by said means intermediate said first plate and the cover.

2. In a refrigerating apparatus, the combination With a pump chamber and the pump therefor, of a removable cover for the chamber, cooling coils attac-hed to and depending from the cover, a plate forming asupport for the coils, means attached to the cover for supporting the plate, a pipe connected With the pump discharge, and a drip plate having an opening through Which such pipe passes and supported by said means intermediate said iirst .plate and the cover.

3. In a refrigerating apparatus, the combination, with a pump chamber and the pump Y therefor, of a removable cover for the chamber, cooling coils attached to and depending from the cover a )late forming a suaaort a L t..

for the coils, means attached to the cover for supporting the plate, a pipe connected With the pump discharge, and a battle plate arranged above said pipe and also supported by sai means intermediate said iii-st plate and the cover. Y

4. In a refrigerating apparatus, the combination with a pump chamber and the pump therefor, of a removable cover for the chamber, ,cooling coils attached to and depending from the cover, a plate forming a support for the coils, means attached to the cover for supporting the plat-e, a pipe connected With the pump discharge, baiiie plate arranged above said pipe, and a drip plate arranged below the vbaffle plate and having an opening through which the pipe passes, said batlie plate and drip plate being also supported by said ieans, said means comprising rods 24 secured at their lower ends to the supporting plate and attached at their upper ends to the cover, and distance tubes encircling the rods and interposed between the bathe plate and the drip plate and between the latter plate and the supporting plate.

5. In a refrigerating apparatus, the combination of a pump chamber, a pump therein having a discharge opening, a battle plate in said chamber adjacent said discharge opening ,and a drip pan under said baille plate.

6. In a refrigerating apparatus, a pump chamber, a pump therein having a discharge pipe, a baiiie plate in said chamber adjacent the end'of said discharge pipe and a drip pan under said baiile plate provided with an opening through Which said discharge pipe extends.

7. In a refri'erating apparatus, the combination of a pump chamber, a pump therein having a discharge opening and immersed in a body of oil, a battle plate in said chamber adjacent the discharge opening and a drip pan under said bae plate and over said body ot oil.

8. In a refrigerating apparatus, the combination of a pump, a discharge pipe for' said pump, a chamber in Which the discharge end of said pipe is located, a battle plate,l in said chamber adjacent the discharge end of said pipe and a drip pan under said bathe plate.

Y 9. In a refrigerating apparatus, the combination of a pump chamber,`a pump therein having a discharge opening, a removable cover for the chamber, a baffle plate in said chamber adjacent said discharge opening, a drip pan under said battle plate, and means for supporting said drip plate and battle from said removable cover.

l0. In a refrigerating apparatus, the combination with a pump chamber and the pump therefor, of a removable cover for the chamber, cooling coils attached to and dependingv from the cover, a pipe connected With the pump discharge, a baiiie plate arranged above said pipe, and a drip plate arranged below rthe baffle plate and having an opening through which the pipe passes, and mean attached-to the cover for supporting the cooling coil, the baifle plate and the drip plate therefrom.

CHARLES L. MCCUEN. 

